TY - JOUR A1 - Freud, Sigmund T1 - Part III. The Theoretical Yield T2 - The International Journal of Psycho-Analysis, London, Vol. XXI (No. 1, 1940), pp. 72-84. Y1 - 1940 UR - https://opus4.kobv.de/opus4-Fromm/frontdoor/index/index/docId/9617 ER -